<s>
Quantum	O
is	O
a	O
color	O
vector	O
arcade	B-Application
video	I-Application
game	I-Application
developed	O
at	O
General	O
Computer	O
Corporation	O
for	O
Atari	O
,	O
Inc	O
.	O
and	O
released	O
in	O
December	O
1982	O
.	O
</s>
<s>
The	O
premise	O
of	O
the	O
game	O
is	O
related	O
loosely	O
to	O
quantum	O
physics	O
;	O
the	O
player	O
directs	O
a	O
probe	O
with	O
a	O
trackball	B-Device
to	O
encircle	O
atomic	O
"	O
particles	O
"	O
for	O
points	O
,	O
without	O
touching	O
various	O
other	O
particles	O
.	O
</s>
<s>
To	O
enter	O
initials	O
for	O
a	O
high	O
score	O
,	O
the	O
player	O
uses	O
the	O
trackball	B-Device
to	O
circle	O
letters	O
in	O
the	O
same	O
fashion	O
used	O
during	O
gameplay	O
.	O
</s>
<s>
If	O
the	O
player	O
achieves	O
the	O
highest	O
score	O
on	O
the	O
table	O
,	O
the	O
initials	O
screen	O
is	O
preceded	O
by	O
another	O
on	O
which	O
adept	O
players	O
can	O
use	O
the	O
trackball	B-Device
to	O
draw	O
their	O
initials	O
.	O
</s>
<s>
A	O
screenshot	O
of	O
a	O
clone	O
called	O
Tachyon	O
was	O
previewed	O
in	O
Atari	B-Device
8-bit	I-Device
family	I-Device
magazine	O
ANALOG	O
Computing	O
,	O
but	O
the	O
game	O
was	O
never	O
completed	O
.	O
</s>
